#+sb-xc-host structure!object
#-sb-xc-host instance
(when (emit-make-load-form value)
- (dotimes (i (%instance-length value))
+ (dotimes (i (- (%instance-length value)
+ #+sb-xc-host 0
+ #-sb-xc-host (layout-n-untagged-slots
+ (%instance-ref value 0))))
(grovel (%instance-ref value i)))))
(t
(compiler-error